The earthquake index value is calculated based on historical earthquake events data using USA.com algorithms. It is an indicator of the earthquake level in a region. A higher earthquake index value means a higher chance of an earthquake.

The volcano index value is calculated based on the currently known volcanoes using USA.com algorithms. It is an indicator of the possibility of a region being affected by a possible volcano eruption. A higher volcano index value means a higher chance of being affected.

The tornado index value is calculated based on historical tornado events data using USA.com algorithms. It is an indicator of the tornado level in a region. A higher tornado index value means a higher chance of tornado events.

Other Weather Extremes Events

A total of 2,905 other weather extremes events from 1950 to 2010 were recorded in Washington. The following is a break down of these events:

Type

Count

Type

Count

Type

Count

Type

Count

Type

Count

Avalanche:

34

Blizzard:

14

Cold:

23

Dense Fog:

6

Drought:

7

Dust Storm:

31

Flood:

269

Hail:

252

Heat:

11

Heavy Snow:

588

High Surf:

5

Hurricane:

0

Ice Storm:

24

Landslide:

27

Strong Wind:

657

Thunderstorm Winds:

290

Tropical Storm:

0

Wildfire:

167

Winter Storm:

57

Winter Weather:

46

Other:

397

Volcanos Nearby

A total of 15 volcanoes are found in or near Washington.

Name

Region

Latitude

Longitude

Elevation (foot)

Type

Status

Last Eruption

Glacier Peak

US-Washington, United States

48.112

-121.113

3213

Stratovolcano

Tephrochronology

Last known eruption 1700-1799

Rainier

US-Washington, United States

46.87

-121.758

4392

Stratovolcano

Dendrochronology

Last known eruption 1800-1899

Adams

US-Washington, United States

46.206

-121.49

3742

Stratovolcano

Tephrochronology

Last known eruption A.D. 1-1499

Baker

US-Washington, United States

48.786

-121.82

3285

Stratovolcano

Historical

Last known eruption 1800-1899

St. Helens

US-Washington, United States

46.2

-122.18

2549

Stratovolcano

Historical

Last known eruption 1964 or later

Indian Heaven

US-Washington, United States

45.93

-121.82

1513

Shield volcano

Radiocarbon

Last known eruption B.C. (Holocene)

West Crater

US-Washington, United States

45.88

-122.08

1329

Volcanic field

Radiocarbon

Last known eruption B.C. (Holocene)

Hood

US-Oregon, United States

45.374

-121.694

3426

Stratovolcano

Historical

Last known eruption 1800-1899

Jefferson

US-Oregon, United States

44.692

-121.8

3199

Stratovolcano

Varve Count

Last known eruption A.D. 1-1499

Garibaldi, Mt.

Canada, Canada

49.85

-123

2678

Stratovolcano

Radiocarbon

Last known eruption B.C. (Holocene)

Garibaldi Lake

Canada, Canada

49.92

-123.03

2316

Volcanic field

Holocene

Undated, but probable Holocene eruption

Blue Lake Crater

US-Oregon, United States

44.42

-121.77

1230

Maar

Radiocarbon

Last known eruption B.C. (Holocene)

Sand Mountain Field

US-Oregon, United States

44.38

-121.93

1664

Cinder cone

Radiocarbon

Last known eruption B.C. (Holocene)

Washington

US-Oregon, United States

44.332

-121.837

2376

Shield volcano

Radiocarbon

Last known eruption A.D. 1-1499

Belknap

US-Oregon, United States

44.285

-121.841

2095

Shield volcano

Radiocarbon

Last known eruption A.D. 1-1499

Historical Earthquake Events

A total of 88 historical earthquake events that had recorded magnitudes of 3.5 or above found in Washington.

Date

Magnitude

Depth (km)

Latitude

Longitude

1949-04-13

7

N/A

47.25

-122.5

1965-04-29

6.5

N/A

47.97

-117.34

1965-04-29

6.5

N/A

47.4

-122.3

1946-02-15

5.8

N/A

47.3

-122.9

1946-02-15

5.8

N/A

47.5

-122.5

1936-07-16

5.8

N/A

46

-118.5

1945-04-29

5.5

N/A

47.4

-121.7

1939-11-13

5.3

N/A

47.4

-122.6

1981-02-14

5.2

7

46.35

-122.24

1976-05-16

5.1

62

48.8

-123.36

1981-05-28

5

3

46.53

-121.41

1964-07-14

5

N/A

48.9

-122.5

1974-04-20

4.9

5

46.76

-121.52

1965-10-23

4.8

N/A

47.5

-122.4

1978-03-11

4.8

25

47.42

-122.71

1976-09-08

4.8

48

47.38

-123.08

1962-11-06

4.8

N/A

45.63

-122.67

1980-05-18

4.7

4

46.21

-122.19

1980-05-27

4.7

4

46.21

-122.19

1969-11-10

4.7

N/A

48.52

-121.4

1981-05-28

4.6

3

46.53

-121.42

1969-02-14

4.5

N/A

48.73

-123.09

1967-05-25

4.5

N/A

48.1

-122.8

1969-02-14

4.5

N/A

48.73

-123.1

1981-05-13

4.5

10

46.37

-122.26

1967-03-07

4.4

N/A

47.8

-122.7

1978-08-23

4.4

17

48.38

-123.2

1963-12-22

4.4

N/A

48.33

-119.33

1971-12-28

4.4

27

47.58

-122.22

1983-10-31

4.3

45

47.35

-123.23

1968-09-06

4.3

N/A

47.8

-122.8

1977-07-10

4.3

11

48.53

-122.45

1968-11-30

4.3

N/A

46.5

-122.4

1976-09-02

4.3

24

48.21

-122.76

1984-04-11

4.3

8

47.53

-120.19

1978-03-31

4.2

23

47.42

-122.72

1970-10-24

4.2

25

47.3

-122.4

1983-08-28

4.2

50

47.95

-122.86

1981-02-18

4.2

N/A

47.21

-120.9

1979-04-08

4.1

5

46

-118.45

1982-03-01

4.1

12

46.35

-122.25

1979-11-26

4.1

20

48.54

-122.41

1969-11-01

4.1

N/A

47.92

-121.85

1964-10-15

4.1

N/A

47.7

-122.1

1973-12-20

4.1

1

46.9

-119.3

1973-07-18

4

11

46.8

-121.8

1969-10-09

4

N/A

46.77

-121.72

1970-05-18

4

11

48.6

-122.7

1979-01-19

4

7

47.9

-119.69

1978-12-31

4

20

47.58

-121.85

1968-06-19

4

N/A

47.2

-122.5

1981-02-02

4

4

46.26

-121

1975-04-16

4

N/A

47.57

-122.91

1975-04-23

4

N/A

47.08

-122.65

1978-03-05

4

57

48.06

-123

1970-02-10

3.9

33

47.7

-122.3

1979-03-11

3.9

16

46.45

-122.4

1983-03-22

3.9

4

46

-118.44

1981-02-14

3.8

7

46.34

-122.24

1981-02-14

3.8

11

46.36

-122.25

1971-01-14

3.8

30

47.4

-123.6

1983-11-14

3.8

6

46.67

-120.59

1980-09-19

3.8

6

47.91

-121.87

1974-05-16

3.8

54

48.14

-122.92

1983-12-05

3.8

6

46.93

-120.7

1979-03-12

3.8

24

48.19

-122.76

1979-07-07

3.8

5

46.52

-122.17

1981-11-12

3.7

26

47.94

-122.42

1966-06-11

3.7

N/A

47.83

-122.55

1979-07-28

3.7

N/A

46.67

-120.59

1983-08-17

3.7

5

48.14

-124.48

1984-06-04

3.7

53

46.21

-123.06

1985-02-28

3.7

47

47.49

-122.59

1978-06-27

3.7

1

46.86

-120.96

1980-05-28

3.6

8

46.34

-122.2

1979-02-01

3.6

9

47.53

-121.92

1976-01-31

3.6

18

48.35

-122.32

1984-06-02

3.6

21

47.42

-122.7

1977-07-13

3.6

N/A

47.06

-120.96

1981-03-15

3.6

5

47.99

-121.5

1979-11-15

3.6

15

49.24

-122.35

1980-06-08

3.5

48

47.98

-123.01

1981-11-26

3.5

22

47.65

-122.62

1969-11-28

3.5

N/A

47.4

-122.7

1973-06-09

3.5

N/A

47.6

-121.8

1981-02-14

3.5

11

46.35

-122.25

1973-02-22

3.5

20

47.2

-122.9

1985-03-18

3.5

53

47.34

-122.62

Historical Tornado Events

A total of 15 historical tornado events that had recorded magnitude of 2 or above found in Washington.

Date

Magnitude

Start Lat/Log

End Lat/Log

Length

Width

Fatalities

Injuries

Property Damage

Crop Damage

Affected County

1969-12-12

3

47°30'N / 122°24'W

47°32'N / 122°19'W

3.80 Miles

100 Yards

0

1

250K

0

King

1972-04-05

3

45°36'N / 122°38'W

45°38'N / 122°27'W

8.70 Miles

440 Yards

6

300

25.0M

0

Clark

1972-04-05

3

47°45'N / 118°31'W

47°46'N / 118°28'W

0

1

250K

0

Lincoln

1954-06-15

2

47°26'N / 117°23'W

0.50 Mile

100 Yards

0

0

25K

0

Spokane

1957-04-30

2

46°36'N / 120°30'W

1.00 Mile

23 Yards

0

0

3K

0

Yakima

1957-05-06

2

47°29'N / 117°12'W

1.50 Miles

23 Yards

0

0

0K

0

Spokane

1958-06-26

2

46°04'N / 118°56'W

0.30 Mile

50 Yards

0

0

25K

0

Walla Walla

1965-11-10

2

46°42'N / 122°54'W

1.50 Miles

23 Yards

0

0

25K

0

Lewis

1966-03-14

2

46°30'N / 117°48'W

1.00 Mile

13 Yards

0

0

3K

0

Columbia

1970-11-24

2

48°06'N / 122°12'W

0.30 Mile

30 Yards

0

0

25K

0

Snohomish

1971-08-30

2

46°55'N / 117°21'W

0.50 Mile

17 Yards

0

0

25K

0

Whitman

1972-04-05

2

47°42'N / 119°06'W

0

0

25K

0

Grant

1972-04-05

2

48°36'N / 118°06'W

1.00 Mile

100 Yards

0

0

25K

0

Stevens

1978-07-17

2

48°11'N / 117°08'W

0

0

0K

0

Pend Oreille

1986-05-13

2

48°13'N / 122°03'W

0.30 Mile

33 Yards

0

0

0K

0

Snohomish

* The information on this page is based on the global volcano database, the U.S. earthquake database of 1638-1985, and the U.S. Tornado and Weather Extremes database of 1950-2010.